Drawing mechanism



A. C. BUTLER July 16, 1929.

DRAWING MECHANI SM Filed June 8, 1925 2 Sheets-Sheet July 16, 1929. A. c. BUTLER DRAWING MECHANISM 2 Sheets-Sheet Filed June 8, 1925 Patented July 16, 1929.

UNITED STATES PATENT OFFICE.

DRAWING MECHANISM.

Application filed June 8,

This invention relates to drawing mechanism for rovings, slivers, and the like, and has for one of its objects to provide a const-ruction'in which relative adjustment of the rollers is made more convenient than in such mechanisms as heretofore commonly constructed and where the weighting of the top rollers is more direct.

As heretofore commonly constructed, the

lines of rollers have been arranged in sliding blocks and inclined to the horizontal at angles of from approximately 25 to 35 (the larger angle being preferable for short staple material), so that the roving issues from between the front rollers directed toward the spindles without requiring that it pass over the periphery of the lower front roller forwardly of the nip between it and its cooperating roller. This is done so thatthe twist from the spindle may run back to the nip between the front rollers and strengthen the roving. The setting of these rollers in inclined arrangement and sliding blocks is awkward and-much of the weight of the top rollers is thrown upon the supporting cap-bar fingers dueto the angle at which they are placed. A special weighthook is also provided having a flat end or base to rest upon the roller beam so that by pressure of the under saddle it is caused to stand upright when the top rollers are unweighted so that it will not fall sideways or foul or displace the rovings or yarns.

According to the present invention the rollers may be arranged in horizontal position, with the exception of the front rollers, which are arranged at the usual angle, with reference to the intermediate rollers, the roving thus being drawn over a portion of the periphery of the lower middle roller on its way to the front rollers.

Heretofore the cap-bars have commonly been pivoted'to the. rear portions of the slide block carrying the intermediate and back lower rollers, and while sometimes the intermediate rolleris arranged to slide for separate adjustment, it is necessary, in any case, to separately adjust at least one line of top rollers.

According to the present invention the cap-bars are pivoted to the adjustable blocks which carry the intermediate and rear rollers, and which in turn are pivoted to the 1925. Serial No. 35,560.

roller stands so that the upper intermediate and back rollers are adjusted simultaneously with the lower rollers, and the slots in the cap-nebs for the front top rollers are laced at angles such that, for the range of c cjustment desired, the front top rollers are automatically adjusted as the capbars are moved relative thereto so that they are maintained in proper cooperative relation to the lower front rollers. A simple way of pivoting or hinging the adjustable block to stands of the ordinary inclination by shortening the later, is also shown.

A further feature of this invention relates to the construction of.a drawing member or draft regulating guide, by. the use of which a much longer draft of the sliver or roving between the middle and back rollers than usual may be effected, and also by the use of whichthe fibers are concentrated and by which, when double rovings are used, they lie in superposed rather than in side by side relation.

It will be evident that while it is preferable to position the rollers, except the front rollers, in horizontal alinement, many features of this inventionare not limited to such arrangement of the rollers, and might be used with advantage in connection with stands as heretofore constructed, having their lines of rollers inclined.

Further objects and advantageous details and combinations of parts will appear from a more complete description of certain .embodiments of the invention shown in the accompanying drawings in which Figure 1 is a side elevation of a roller stand illustrating this invention.

. Figure 2 is a fragmentary top plan of the drawing mechanism at a stand.

Figure 3 is a fragmentary rear elevation at a stand.

Figure 4 is a detail of a weighting connection.

Figure 5 is a view similar to Figure 1, but illustrating a modification.

Figure 6 is a perspective of a drawing member control block.

Figure 7 is a view similar but to a smaller scale to Figures 1 to 5 showing a further modification.

Figure 8 is a fragmentary perspective of a drawing member shown also in Figure 7.

Figure 9 is a perspective of an adjusting screw.

Figure 10 is a detail illustrating a different means for adjusting the front lower roller.

Referring first to Figures 1 to 4-, at l'is indicated a roller stand having a bearing for a journal of the lower front roller.

The lower intermediate and rear rollers 12 and 1.3 are shown as carried by a block 14, which in turn is supported by the stand 1, ineach stand this block or carriage being adjustable to change the spacing between these rollers and the front lower roller 5. As shown this block or carriage is pivoted asat 15 to the rear downwardly turned extremity of the portion 10 of the stand so that the adjustment of the lower intermediate and rear rollers relative to the front lower roller maybe effected by tilting the block 14 about the axis 15. For this purpose an adjusting screw is shown as threaded through the forward portion of the stand at an upwardly and rearwardly inclined position, its upper end bearing against the forward portion 17 of the block or carriage. A look nut 18 may be employed to fix the adjusting screw 16 in any desired position.

As shown the block 14, when in its lower position, is so arranged that the rollers 12 and 13 are in substantially horizontal alinement, but are positioned above the front lower roller 5 so that the roving as it passes over the lower intermediate roller 12 inclines downwardly to the front lower roller 5 at the usual inclination for such rovings. At 20 is shown the usual traverse bar having roving guides 21 therethrough back of the rear lower roller 13.

The cap-bar fingers 25 are pivoted as at 26 to the rear portions of the blocks 14 so that when these blocks 14 are adjusted the fingers move therewith. These fingers have at their opposite sides grooves 30 arranged substantially vertically for the intermediate andrear top rollers 85 and 36, re spectively. To the forward end of each of the cap-bar fingers 25 may be fixed an extension or cap-nob 40, .or, if desired, this might be integral with the finger, the forward end of this extension having inclined slots 43 arranged at such an angle that they are substantially tangential to an arc struck about the axis 15 as a center. Thus as the blocks 14 are tilted upwardly the front top roller 45 supported between these front nebs remains substantially in the same relation relative to the lower front roller 5, the fingers 25 tilting with the blocks so that the adjustment of the blocks 14 is substantially without any effect on the front top rollers. Thus no separate adjustment of the front top roller is necessary when the intermedi ate and back rollers are adjusted.

As is shown, means are provided for holding the cap-bar fingers down to the blocks 14 to prevent pivotal movement thereof. Such means may comprise the locking bolts shown as passing through perforations in the fingers and threaded into the blocks. The cap-fingers over. each stand are provided with a downwardly extending lug 52 which rests against the block to determine the lowered position of the cap-bar.

lVith'the substantially horizontal arrangement of the upper intermediate and rear rollers 35 and 36, weighting of these rollers is directly downward and is easily accomplished. As shown a weighting bar 55 having its rear lower portion, as at 56, shaped to engage the ear upper rollers 36, and a forward inclined portion 57 engaging the top intermediate rollers 35 is provided intermediate its engagement with these top rollers with a depression 58 in which may be engaged the upper hooked portion of a rod or weight hook 60. Means may be provided for preventing the hook 60 from falling laterally sufficiently to foul or disarrange the roving. For this purpose this hook is shown as having its lowor end bent into a loop as at 61 (Figure 4) the upper portion of this loop having engaged thereover one end of a stirrup 62. The inclined portion 57 acts to hold the rollers 35 against the forward edges of the guiding grooves of the cap fingers. The other end of the stirrup engages over the lower end of a rod 63, the upper end of whichis hooked to engage over the front upper roller 45. Centrally this stirrup 62 {may have suspended thereon a link 65 to which a suitable weight or spring may be attached, this link 65 as shown passing through the roller beam or table 66 on which the stands are mounted. The lower portion of the loop 61 is flat as at 610 so that when the upper end of the rod 60 is unhooked the flat portion rests on the fiat upper face of roller beam 66 and is pressed thereagainst by the weighted stirrup 62, thus holding the rodin an upright position ready to be rehung on the bar 55.

Between the intermediate and rear rollers 12 and 13 a drawing member may be positioned comprising a non-rotatable rod or bar 7 O or a roller for supporting the rear end of a frictional drawing plate or a grooved regulating drawing guide, over or through which the roving passes and which produces a drawing frictional effect thereon as it passes to the intermediate rollers. This drawing member should be adjustable to conform to the length of staple being drawn and for this purpose it is shown as being positioned by an adjustable holder 71 secured to the stock by a set screw passing through a slot 72 in the holder. This drawing member compacts or compresses the rov ing-slightly where it engages it, thus retarding its progress and holding it intact so that only those fibers which are positively gripped in the nip of the intermediate rollers which are positioned forwardly thereof are drawn. I

In Figure 5 a stand of the ordinary inclination has been cut and adapted to carry over intermediate or rear rollers in an adjustable block to which it is pivoted at 81. This block may be adjusted about this pivot to space the lower intermediate and rear rollers 12 and 13 from the front lower roller 5 by means of the screw 82 passing through a threaded opening upwardly and rearwardly inclined in the stand and having its upper end 83 which engages the block formed with flattened portions 84, as shown best in Figure 10, so that the weight of the block 80 tends to hold the screw in any adjusted position. The cap-bar fingers 85 in this construction are pivoted at 86 to the rear portions of the blocks 80 and the capnebs 88 and 89 for the front and intermediate top rollers 45 and 35 are adjustable along a forwardly extending stem portion 90 of each of the cap-bar fingers. At 91 is shown a drawing member positioned between the intermediate and rear sets of rollers similar to the bar 70 mounted upon the block, but held in position by spaced finger portions 92 projecting from the lower edge of a block 93 adjustably fixed to the stem portion 90 of the cap-bar finger as shown in Figures 5 and 7 In Figure 7 a further slight modification is shown in which the stem 95 of each of the cap fingers 96 is extended forwardly and turned downwardly at its forward end as shown at 97 for the reception of the block 98 grooved to receive the top front rollers.

The drawing member or draft-regulating guide 100 between the intermediate and rear rollers is also of a somewhat different construction, being shown in detail in Figure 8. This drawing member comprises a bar of substantially square cross section having slots 101 out across its upper face to receive the rovings. These slots are of uniform width throughout their lengths at their lower portions as at 102 where the roving normally lies as it passes therethrough. The rear upper corners 103 at these notches are shown as cut away to facilitate the ready insertion of the rovings therein. These notches 101 are quite narrow so that in case a pair of rovings are passed therethrough they lie in superposed relation rather than side by side. This member 100 is shown as positioned from the cap fingers as by means of the blocks 105 having portions 106 straddling this member, these blocks being adjustable lengthwise of the fingers to determine the spacing of this drawing or draft-regulating member relative to the intermediate and rear sets of rollers and it is preferably given a traversing motion as by means of an arm 107 depending therefrom engaged by a member 108 projecting forwardly from the traverse bar 20.

In Figure 10 a slightly modified mounting for the front lower roller is shown. The front portion of the roller stand is slotted as shown at 110 (Figure 10) and has slidable therein a bearing block 111 which is vertically adjustable by means of an adjusting bolt 112 threaded through the forward portion of the roller stand and bearing against the under face of the block 111. A look nut 113 may be employed to fix the bolt 112 in adjusted position. The upper portion of the block 111 is recessed to form a bearing for the journaled portion 115 of the front rollers are maintained in proper relation regardless of adjustment between the lower front rollers and rear and intermediate lower rollers, so that no separate adjustment of these front top rollers is neces- 'sary.

Having thus described certain embodiments of this invention it should be evident to those skilled in the art that various changes and modifications might be made therein without departing from its spirit or scope as defined by the appended claims.

I claim:

1. A roving drawing member comprising a bar having a slot to receive the roving, said slot being of substantially uniform dimensions throughout that portion through which the roving normally passes and of a size to impart a drag to the roving to hold back roving fibers not gripped forwardly thereof in the passage of the roving therethrough.

2. A roving drawing member comprising a bar having a roving-receiving slot extending inwardly from one face and of substantially uniform width from the top to the bottom thereof throughout that portion through which the roving passes and of a size to impart a drag to the roving to hold back roving fibers not gripped forwardly thereof in the passage of the roving therethrough.

3. A roving drawing member comprising a bar having a roving-receiving slot extending inwardly from one face and of substantially uniform width from the top to the bottom thereof throughout that portion through which the roving passes and of a size to impart a drag to the roving to hold back roving fibers not gripped forwardly thereof in the passage of the roving therethrough, the rear upper edges of said bar adjacent to said slots being cut away to facilitate placing of the roving therein.

4. In combination with spaced roving feeding members, of a roving drawing member positioned between said feeding members and adjustable relative thereto in ac cordance with the length of the staple being drawn, said drawing member comprising a bar having a slot to receive the roving, said slot being of substantially uniform dimensions throughout that portion through which the roving normally passes and of a size to impart a drag tot-he roving to hold back roving fibers not gripped by the forward of said roving feeding members.

5. In combination with spaced roving feeding members, of a roving drawing member positioned between said feeding mem bers and adjustable relative thereto in accordance with the length of the staple being drawn, said drawing member comprising a bar having a roving-receiving slot extending inwardly from one face and of substantially uniform width throughout that portion through which the roving passesand of a size to impart a drag to the roving to hold back roving fibers not gripped by the forward of said roving feeding members.

6. In combination with spaced roving feeding members, of a roving drawing member positioned between said feeding members and adjustable relative thereto in accordance with the length of'the staple being drawn, saiddrawing member comprising a bar havin a rovin -receivin slot extendin O b D O inwardly from one face and of substantially uniform width throughout that portion through which the roving passes, and of a size to impart a drag to the roving to hold back roving fibers not gripped by the forward of said roving feeding members, the

rear upper edges of said bar adjacent to said slots being cut away to facilitate placing of the roving therein.

7. In combination with spaced roving feeding members, of a roving drawing member positioned between said feeding members and adjustable relative thereto in ac- ARTHUR CECIL BUTLER. 

